On Tue, Jan 29, 2019 at 01:38:14PM -0800, Paul O'Rorke wrote:
> What does node-id do? 

With more than two nodes DRBD needs some information against which other
peer(s) it tracks changes. In DRBD8 you only have one peer, "easy", in
DRBD9 you have to know this is "Node A", this is "Node B",... Using
information that changes (e.g., hostnames) is too volatile. So one has
to give nodes an ID, a unique identifier that never changes. (There are
scenarios where you don't need them even in DRBD9 setups, but let's not
go down that rabbit hole).

> Is it a drbd 9.0.x / Linstore thing?  I'm using 8.9.6

yes, a DRBD9 thing.

Regards, rck
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